Sheet-metal binding



(No Model.)

W. DUNCAN.

SHEET METAL BINDING. No. 397,279. Patented Feb. 5, 1889.

I \VILLIAM DU i "AN.

PATENT OFFICE.

OF IIINSDALE, ASSIGNOR TQ HIMSELF, ANll ALEXANDER S. JOHNSTON, OF CHICAGO, ILLINOIS.

SHEET-METAL BINDING.

SPECIFICATION forming part of Letters Patent Application filed April 27, 1838.

To all whom it may concern.-

Be it known that I, \VILLIAM DUNCAN, of l-Iinsdale, in the countyot' Du Page and State of Illinois, have invented certain new and 5 useful Improvements in Sheet-Metal Bindings; and I do hereby declare that the following is a full, clear, and exact description- The invent-ion consists in the matteishere-, inafter described, and pointed out in t-he ap-- 2o pended claims.

Metal bimliug-strips as heretofore made consist of a flatstrip of tin or other metal, which is folded or bent over or with the edge of the paper or clot-h comprising the show- 2 5 card or map,

of the paper or strippermanentlyattached thereto. A-biud:

ing strip embodying my invention ,is at tached to the flexible material composing-the 3o show-card or map in the same mannerashere tofore; but the strip itself, instead ofbeing.

narrow and "at, is made of considerable width and is bent into tubular form, thereby -mak-.

ing a strip similar in appearance toxthe 5 wooden bars or rollers heretofore couun'ouly employed in similar situations.

advantage of enabling the show-cant or other 40 article to be closely wrapped or rolled about them for convenience and safety in mailing or transportation.

In the accompanyingdrawings illustrating my invention, Figure 1 is a perspective view 45 of an article of flexible material provided with metallic bimling-st-rips at its top and bottom, the strip at the edge being con.

structed in accordance with my invention. Fig. 2 is an enlarged cross-section I 50 binding-strip, taken upon line 2 2 of Fig. 1.

so as to clamp and hold the'edge' cloth, and thus retain the The metal strips will commonly be made of eylindrie form, and when thus shaped have the great of the lower ig. 3 is a sectional view of thebinding-strip,

No. 397,279, dated February 5, 1339,

Serial No. 272,015. (No model.)

showing the process of constructing the same. Fig. 4 is a sectional view similar to Fig. showing a somewhat similar construction in the fold or seam uniting the sheet metal 5 strip to the flexible sheet. Fig. 5 is a seetioual view of the binding-strip, illustrating still another form thereof.

As shown in said drawings, A is a sheet of paper, cloth, or other flexible material. Such 6 sheet may represent a map, show-card, diagram, or other similar article.

B a sheet-metal binding applied to the upper edge of the sheet A. Said binding B is like those heretofore made, consisting of a flat strip of metal bent or folded over and with the edge of the sheet, so as to clamp the binding firmly to the sheet.

C is a tubular binding applied to the bottom edge of the sheet A. Said binding consists of a flat strip of metal of considerable width, one edge of which is secured by a scam or fold, c, to the margin of the sheet A, and the main part of which is bent into tubular form.

j In applying the bimling-strip to the sheet one edge of the said strip is first seamed or folded with or clamped against the edge of the sheet while the strip is flat, as shown in Fig. 3, and the flat part of the strip is bent into tubular form and given a cylindric form or any ornamental shape desired. As shown in Figs. 1, 2,.and i, the seam e is formed by li'rst clamping the. edge of the sheet in a fold oft-he metal strip, and then again folding the metal so as to form a double fold, in a manner heretofore common in applying metal binding-strips. As illustrated in Fig. 4, the sheet A is secured to the himling-strip by a single fold only of the strip. After the strip is secured to the sheet by seaming, the metal strip is given a tubular form by bending around a mandrel orbyany other well-known or preferred manner. As illustrated in Figs. 1 and *2; the metal strip is so bent. that the t scam 0 comes at the inside thereof, and this construction will usually be preferred as giving a smooth finish to the exterior of l the binding. The strip may, however, be

bent in theopposite direction, as illustrated l -.in Fig. 5, the scam in such case being desirably located adjacent to the rear face of the by a folded scam, the other odgeof said strip form of n molding instead of being cylindric. bearing against the opposite side of the sheet,

I (-laim as my inventionwhereby additional hold is had on the Sheet, 15 I. A binding for the edges of maps and the substantially as desoriboil.

shoot. A, Fig. 5 shows the st rip as having the like, consisting of a lnlmlnr strip of metal, In testimony thatI claim the foregoing as our edge thereof living pormmn-nlly united my invention Ia-fiixmy signature in prosenvo with tho mlgo of the sheet by a fllllhd seam, of two witnesses. substantially as dosm'ibml.

:3. Ahimling fortlloodgvsofmapmonrinins, and the like, eonsisling of a strip of shoot 1 metal ol'lulmlnr form, onomlgro l-hoi'eof being n-rnmnvnlLv unitml lo the mlgo ol' the shoot.

\VILLTAM 1) UN CAN.

Witnesses:

l. (LAREME Poona, l). B. ELLIAs. 

